<template>
  <div>
    <!--查询表单-->
    <el-form :inline="true" class="demo-form-inline">
      <el-form-item>
        <el-input v-model="courseQuery.title" placeholder="课程名称"/>
      </el-form-item>
      <el-form-item>
        <el-select v-model="courseQuery.status" clearable placeholder="课程状态">
          <el-option :value="'Normal'" label="已发布"/>
          <el-option :value="'Draft'" label="未发布"/>
        </el-select>
      </el-form-item>
      <el-form-item label="添加时间">
        <el-date-picker
          v-model="courseQuery.begin"
          type="datetime"
          placeholder="选择开始时间"
          value-format="yyyy-MM-dd HH:mm:ss"
          default-time="00:00:00"
        />
      </el-form-item>
      <el-form-item>
        <el-date-picker
          v-model="courseQuery.end"
          type="datetime"
          placeholder="选择截止时间"
          value-format="yyyy-MM-dd HH:mm:ss"
          default-time="00:00:00"
        />
      </el-form-item>
      <el-button type="primary" icon="el-icon-search" @click="getList()">查
        询
      </el-button>
      <el-button type="default" @click="resetData()">清空</el-button>
    </el-form>

    <!-- 表格 -->
    <el-table
      :data="list"
      border
      fit
      highlight-current-row
      element-loading-text="数据加载中"
      v-loading="loading"
    >

      <el-table-column
        label="序号"
        width="70"
        align="center">
        <template slot-scope="scope">
          {{ (page - 1) * limit + scope.$index + 1 }}
        </template>
      </el-table-column>

      <el-table-column prop="title" label="课程名称" width="300"/>

      <el-table-column label="课程状态" width="80">
        <template slot-scope="scope">
          <el-tag v-if="scope.row.status==='Normal'" type="success">已发布</el-tag>
          <el-tag v-if="scope.row.status==='Draft'" type="danger">未发布</el-tag>
        </template>
      </el-table-column>

      <el-table-column prop="lessonNum" label="课时数" width="70"/>

      <el-table-column prop="gmtCreate" label="添加时间" width="160"/>

      <el-table-column prop="viewCount" label="浏览数量" width="90"/>

      <el-table-column label="操作" width="500" align="center">
        <template slot-scope="scope">
          <router-link :to="'/teacher/edit/'+scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit">编辑课程</el-button>
          </router-link>
          <router-link :to="'/teacher/edit/'+scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit">编辑大纲</el-button>
          </router-link>
          <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeDataById(scope.row.id)">删除课程
          </el-button>
        </template>
      </el-table-column>
    </el-table>

    <!--分页-->
    <el-pagination
      background
      layout="prev, pager, next"
      :total="total"
      :page-size="limit"
      :current-page="page"
      style="padding: 30px 0; text-align: center;"
      @current-change="getList"
    >
    </el-pagination>
  </div>
</template>

<script>
  import course from "@/api/edu/course";

  export default {
    data() {
      return {
        list: null,//查询之后接口返回集合
        page: 1,//当前页
        limit: 3,//每页记录数
        total: 0,//总记录数
        courseQuery: {},//条件封装对象
        loading: true,//ElementUI加载 true加载动画
      }
    },
    methods: {
      getList(page = 1) {
        this.page = page
        course.getCourse(this.page, this.limit, this.courseQuery)
          //请求成功
          .then(response => {
            //将请求成功响应的数据相应的赋值
            this.list = response.data.rows
            this.total = response.data.total
            this.loading = false //数据获取成功关闭加载动画
            // console.log(response);
            // console.log(this.list);
            // console.log(this.total);
          })
          .catch(error => console.log(error))//请求失败
      },
      //清空输入框
      resetData() {
        //表单输入项清空
        this.courseQuery = {}
        //查询所有讲师数据
        this.getList();
      },
      //根据id删除课程
      removeDataById(id) {
        alert(id)
        this.$confirm('此操作将删除此课程记录, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          course.deleteCourse(id)
            .then(resp => {
              //提示信息
              this.$message({
                type: 'success',
                message: '删除成功!'
              });
              //获取页面数据
              this.getList()
            })
        }).catch(() => {
          this.$message({
            type: 'info',
            message: '已取消删除！'
          })
        })
      }
    },
    created() {
      this.getList()
    }
  }
</script>

<style scoped>

</style>
